Compressnfly Blog
Expert guides on compressing PDFs, images, Word documents, and more — free, private, and in seconds.
How to Get a Photo Under 20 KB, 50 KB or 100 KB for Online Forms
What each size limit looks like on a real phone photo, how to keep tiny photos sharp, and fixes for the upload errors forms throw at you.
HEIC vs JPG: Why Your iPhone Photos Won't Open (and 4 Ways to Fix It)
What HEIC is, where it breaks, and what happened when we converted real iPhone photos to JPG and PNG.
How to Compress a PDF for Email — Fit Gmail's 25MB Limit
PDF too big to email? Learn why attachments bounce even under 25MB, and compress yours to fit Gmail and Outlook in seconds — free, no upload.
How to Reduce PDF File Size on Windows, Mac, iPhone and Android
What each device can and can't do built-in, where Mac Preview falls short, and the method that works everywhere.
File Compression Explained: What Shrinks, What Doesn't, and Why
A CSV shrank 84%. A ZIP of photos shrank 0.2%. Lossless vs lossy compression, tested on real files, with the right method for each file type.
File Size Limits for Email, WhatsApp and Upload Forms
Gmail, Outlook, Yahoo and WhatsApp limits, why a 20 MB file can bounce from a 20 MB inbox, and the target sizes that work.
How to Compress a Video Without Ruining It: Settings That Actually Work
One formula predicts every video's size. Plus real re-encoding results, and HandBrake settings to fit any limit.
Audio Formats Explained: MP3 vs AAC vs FLAC vs WAV (With Exact File Sizes)
Exact megabytes per minute for every common format, and which one to use for music, podcasts and voice notes.
How to Compress a PDF Without Losing Quality (We Tested 3 Real PDFs)
A text PDF, a photo report and a scanned contract, compressed and measured. What stays sharp, and how small a scan can get and still be readable.
How to Compress Images Without Losing Quality: Real Results From 3 Phone Photos
Three phone photos, every setting, exact sizes and dimensions — and which size to use for email, websites, printing and forms.
How to Reduce Word Document File Size: 7 Methods (With Real Results)
A 10-second check shows what's bloating your .docx. Then 7 fixes, including the one that took a 9.46 MB report to 384 KB.
Why Is My File So Large? How to Find the Cause (and Fix It)
How big files should be, the 10-second check for bloated Word files, and the real causes behind huge PDFs and photos.
Compress Files Online Free, With No Signup and No Upload
Real before-and-after results for photos, PDFs, Word files, CSVs and ZIPs, all compressed in your browser.